I totally, completely agree with your point and with the parent post ("I could have created this", "but you didn't"), but...
...you can still, after all of this, conclude that the piece of art is snobbish, artless garbage. In fact I reserve the right to do so. I agree with your premise and still think "Fountain" is worthless as art. I could indeed have done this -- and yes, I see the irony, "but you didn't" -- and didn't because I didn't think it's the kind of art I want to make or celebrate. It's Duchamp's right to create it but I'm not a mean or ignorant person if I dislike it or consider it snobbish and not worth my time (or even "not art").
I don't know if Fountain is or isn't art. I "know" it's worthless to me. This is a discussion we must still be able to have, otherwise we can't say anything about artistic endeavors unless it's positive...